<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text">
<script>
    $("input").on("input", function(){
        this.value = this.value.replace(/\ud83d[\udc00-\ude4f\ude80-\udfff]/g, '');
    });
</script>
</body>
</html>